Mixtures & SolutionsàInvestigation 2: Study Guide
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Mixtures & SolutionsInvestigation 2: Study Guide 1. Write and understand the definitions of each of the words below: Concentration: _______________________________________________ _______________________________________________ _______________________________________________ Evaporation: _______________________________________________ _______________________________________________ _______________________________________________ Density: _______________________________________________ _______________________________________________ _______________________________________________ 2. Three solutions are made, all using the same solid and all 3 are equal amounts Solution 1 Solution 2 Solution 3 650 mL of water 300 mL of water 900 mL of water Which solution is most concentrated? _______________ How do you know? ___________________________________________________ ___________________________________________________ Which solution is least concentrated? _______________ How do you know? ___________________________________________________ ___________________________________________________ 3. You make two solutions. Solution 1 has 50 mL of water and 32 g of solid and solution 2 has 100 mL and 16 g of the same solid. You decide to weigh them to find out which is more concentrated. Is this procedure correct, why or why not? ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ 4. You make four solutions using the same solid. The data is shown below. Solid Water Solution 1 Solution 2 5 grams 12 grams 50 mL 50 mL Solution 3 Solution 4 22 grams 50 grams 50 mL 50 mL Which solution is the most concentrated? __________ 5. You are mixing salad dressing and notice the oil in the dressing floats on top of the vinegar. Why does the oil float on top of the vinegar? ___________________________________________________ 6. Use what you know about density and the information in the table below to label the layers on the graduated cylinder to show the order that the liquids would stack up. Label R S P L Density 41g / 50mL 65g / 50mL 50g / 50mL 62g / 50mL 7. Use the space below to describe what concentration is and how it changes as salt is added to water to make a solution. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ 8. When ocean water and lake water are mixed together, the lake water layers on top of the ocean water. Explain the property of the two kinds of water that causes this to happen. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________
